Cluster headache is a primary headache syndrome thatis under-diagnosed and in many instances undertreated.The pain produced during a cluster headacheis more severe than that generated by any otherprimary headache. Cluster headache is verystereotyped in its presentation and is fairly easy todiagnose with an in-depth headache history. Clusterheadache is easy to treat in most individuals if thecorrect medications are used and the correct dosagesare prescribed.This article presents information on theclinical presentation of cluster headache and bothmedicinal and surgical interventions.There is no more severe pain than that sustained by acluster headache sufferer and if not for the rather shortduration of attacks most cluster sufferers would choosedeath rather than continue suffering. Cluster has beennicknamed the ‘suicide headache’ because clustersufferers typically have thought about taking or havetaken their lives during a cluster headache.